SMTP.com review

Transactional email APIssmtp.com★★★☆☆ 2.6/5 our score

SMTP.com in short

SMTP.com is a transactional email service with API + SMTP and a delivery focus. It is solid for sending, with cost and dedicated infrastructure scaling with volume.

Verdict: SMTP.com is a capable transactional email API, though cost and delivery control improve only past the free tier.

Pros

…Get the full `proxyAddresses` list (aka email aliases) for each user. `Enable-RemoteMailbox` only stamps the primary SMTP and remote routin
I’m a huge fan of Sendgrid. Sorry. The devex is really good, the system works really well (I’ve used SMTP.com as well and my deliverability
…It allows you basically to filter on whatever is available in the SMTP…
REST API + SMTP relay, both

Cons

…targeting Defender, test your templates through tester mail before sending. some red teamers use self hosted SMTP with Postal or similar fo
…dynamic IP (Cloudflare, etc.) * Host your mailboxes locally * Have your mail server smart relay out to a third-party SMTP service like [SMT
…address in the from-line of the composer. Because it is abused for spam. The answer is that easy. I manage an incoming SMTP mail gateway, m
We don't use either of these company's APIs anymore since we're doing our own outbound SMTP, but we've used both - https://elasticemail.com/
Free tiers are small (100s/day)

What people say on Reddit

All 24

18 critical5 mixed1 positive

Criticalr/cybersecurityJul 2026▲ 17

microsoft blocking gophish

…targeting Defender, test your templates through tester mail before sending. some red teamers use self hosted SMTP with Postal or similar for a cleaner reputation…

View original on Reddit

Criticalr/selfhostedDec 2022▲ 15

i am trying to self host a mail server and i

…dynamic IP (Cloudflare, etc.) * Host your mailboxes locally * Have your mail server smart relay out to a third-party SMTP service like [SMTP.com](https://SMTP.com), Amazon AWS, etc. They will have solutions that don't require port 25 \*and\* you'll have better deliverability than you can ever…

View original on Reddit

Criticalr/ProtonMailDec 2022▲ 10

smoother transition with 3rdparty email addresses

…address in the from-line of the composer. Because it is abused for spam. The answer is that easy. I manage an incoming SMTP mail gateway, more than 70% of captured spam originating from free e-mail services such as outlook.com and *in particular* gmail uses such tricks. If you really need such a…

View original on Reddit